//
//  LeGui.cpp
//  Leste
//
//  Created by 王乐 on 2022/1/25.
//

#include "LeGui.h"



LeGui::LeGui() {
}

LeGui::~LeGui() {
}



void LeGui::initGui(GLFWwindow *window) {
    //---------------init imgui-----------------
    // Setup Dear ImGui context
    IMGUI_CHECKVERSION();
    ImGui::CreateContext();
    ImGuiIO& io = ImGui::GetIO(); (void)io;
    //io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;     // Enable Keyboard Controls
    //io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;      // Enable Gamepad Controls

    // Setup Dear ImGui style
    ImGui::StyleColorsDark();
    //ImGui::StyleColorsClassic();

    // Setup Platform/Renderer backends
    ImGui_ImplGlfw_InitForOpenGL(window, true);
    ImGui_ImplOpenGL3_Init("#version 150");
}

void LeGui::showGuiWindow()
{
    // 2. Show a simple window that we create ourselves. We use a Begin/End pair to created a named window.
    ImGui::Begin("Hello, world!");                          // Create a window called "Hello, world!" and append into it.

    ImGui::Text("This is some useful text.");               // Display some text (you can use a format strings too)
    ImGui::Checkbox("Demo Window", &show_demo_window);      // Edit bools storing our window open/close state
    ImGui::Checkbox("Another Window", &show_another_window);

    ImGui::SliderFloat("float", &dTestPara, -1.0f, 1.0f);            // Edit 1 float using a slider from 0.0f to 1.0f
    ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color

    if (ImGui::Button("Button"))                            // Buttons return true when clicked (most widgets return true when edited/activated)
        counter++;
    ImGui::SameLine();
    ImGui::Text("counter = %d", counter);

    ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
    ImGui::End();
}

void LeGui::shutGui() {
    ImGui_ImplOpenGL3_Shutdown();
    ImGui_ImplGlfw_Shutdown();
    ImGui::DestroyContext();
}

void LeGui::startGui() { 
    // Start the Dear ImGui frame
    ImGui_ImplOpenGL3_NewFrame();
    ImGui_ImplGlfw_NewFrame();
    ImGui::NewFrame();
}

void LeGui::renderGui() { 
    ImGui::Render();
    ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
}

void LeGui::showDemoWindow() {
    // 1. Show the big demo window (Most of the sample code is in ImGui::ShowDemoWindow()! You can browse its code to learn more about Dear ImGui!).
    if (show_demo_window)
        ImGui::ShowDemoWindow(&show_demo_window);
}

void LeGui::showAnotherWindow() {
    // 3. Show another simple window.
    if (show_another_window)
    {
        ImGui::Begin("Another Window", &show_another_window);   // Pass a pointer to our bool variable (the window will have a closing button that will clear the bool when clicked)
        ImGui::Text("Hello from another window!");
        if (ImGui::Button("Close Me"))
            show_another_window = false;
        ImGui::End();
    }
}


